68 



minutely creimlated. First segment of tiresome with a distinct and rather 

 deep transversal depression dorsally. Eyes narrow reniform, pigment light 

 red. Superior antennae rather like those organs in the preceding species, but 

 with the 1st joint of the fiagellnm comparatively larger, especially in the 

 male. Inferior antennae in female considerably longer than the superior, the 

 flagellum being rather slender and composed of about 15 joints. Epistome 

 scarcely projecting in front of the anterior lip, though being defined from the 

 same by a distinct incision. Anterior gnathopoda considerably shorter and 

 stouter than in 0. minnta, carpal joint rather short, propodos about twice its 

 length and distinctly tapering to the transversally truncated tip. Pereiopoda 

 comparatively more powerful, with the dactylus much stronger; basal joint 

 of the 3 posterior pairs shorter than the remainder part of the leg, that of 

 the 3rd pair more evenly rounded than in 0. minnta. Last pair of uropoda 

 with the inner ramus scarcely as long as the basal joint of the outer, the 

 latter provided in female with 3 setse on the inner edge. Telson regularly 

 tapering distally and cleft beyond the middle, the terminal lobes not at all 

 diverging. Colour whitish. Length of adult female l l /z mm. 



Remarl-x. In its general habitus this species shows so great a 

 resemblance to 0. minnta as easily to be confounded with it, at least if the 

 specimens examined are preserved in spirits. On a closer examination, however, 

 several well marked characters will be found to distinguish it from that 

 species, among others the narrow reniform eyes, the slender inferior antennas, 

 the much shorter and stouter anterior gnathopoda, the more powerful structure 

 of the pereiopoda, and lastly the form and armature of the last pair of 

 epimeral plates of the metasome. 



Occurrence. I had not myself been aware of this species before 

 Mr. Schneider last year sent me some detail-drawings of a supposed new 

 species of OirhoHirne found by liim in the Malangenf j ord, Finmark. On 

 comparing these drawings with the figures and description given by Boerk 

 of his Orchomene pnujrix, I found so much agreement that I could not but 

 believe both forms to be identical. Subsequently, on looking over the vast 

 material of 0. minnta collected by me at different times and in different 

 places, I succeeded in picking up several specimens of the same form, both 

 males and females, and have now T convinced myself that this species is in 

 reality the 0. ping vis of Boeck. In what locality my specimens were collected 

 I cannot, however, say with certainty, but believe them to be from the west 

 coast of Norway. Boeck himself found only a single specimen at Mandal, 

 south coast of Norway, and mentions another specimen taken at Lofoten 

 in a depth of 200300 fathoms. 



Distribution. - Siberian Polar Sea (Stuxberg). 



